147440 Includes Only:ChecKit® Comparator D 55 with mirror opticsChecKit® Disc Copper LR free and total30 tablet reagents Copper No.130 tablet reagents Copper No.22 plastic cuvettes 10 ml with lidPlastic stirring rod, length 10 cmInstruction manualCaseFeatures:Step-By-Step Instructions: Multi-lingual instructions provide an illustrated step-by-step explanation of how to conduct the test - ensuring that even "non-chemists" can achieve reliable and accurate measurements quickly.Wide Variety of Parameters: Many parameters have multiple testing ranges and methods. Additional testing parameters can be added by purchasing additional discs and reagents - utilize the same comparator housing for all of your test.One Piece Comparator Housing: The rugged design of the one-piece comparator housing has no "moving pieces" that can become lost or broken. Simply slip the color disc into the housing until it cli-cks into place and you're ready to test. Test results are easily viewed in the results window.Easy to View Results: The Diffuser Panel on the backside of the ChecKit® Comparator housing helps to disperse light evenly among the sample and the blank tube. This makes it easier to achieve an accurate color match and helps the user visually compensate for turbidity in the sample.Continuous Color Gradient: Color discs have a continuous color gradient making it possible to achieve a direct color match - no need to extrapolate the result between two color standards.Applications:Waste water treatmentChecKit® Comparator Test Kits are accurate, easy to use test kits for water analysis. Simply add the reagent to the sample cell, rotate the disc until the color matches the prepared water sample and read the concentration value.